.comWidth {
  width: 1000px;
  margin: 0 auto;
}
ol, ul {
  list-style: none;
}
.fl {
  float: left;
}
.fr {
  float: right;
}
.hide {
  display: none;
}
.show {
  display: block;
}

/*清除浮动*/

.clearfix:after {
  content: "";
  display: block;
  clear: both;
}
.clearfix {
  zoom: 1;
}